| 释义 |
asymptotic, a.|æsɪmˈtɒtɪk|
[f. prec. + -ic, after Gr. πτωτικός.]
1. Math. = next.
1671Phil. Trans. VI. 3065 Asymptotick spaces..comprised between two lines, which being infinitely prolonged do never meet. 1881Maxwell Electr. & Magn. I. 167 The equi⁓potential surfaces have each of them an asymptotic plane.
2. asymptotic freedom (Particle Physics): an absence of coupling between quarks and gluons which is approached as their energy increases but is never attained.
[1973Gross & Wilczek in Physical Rev. Lett. 25 June XXX. 1343 We have found that they [sc. non-Abelian gauge theories] possess the remarkable feature..of asymptotically approaching free-field theory. Such asymptotically free theories will exhibit, for matrix elements of currents between on-mass-shell states, Bjorken scaling. ]1973Physical Rev. D 15 Nov. VIII. 3646/1 In the case of pure gauge theories asymptotic freedom provides no constraint. 1974Physics Rep. XLV. 133 The discovery of asymptotic freedom has opened new avenues in strong interaction theory. 1976Sci. Amer. Nov. 56/3 Ultraviolet freedom is also known as asymptotic freedom, because the state of completely independent movement is approached asymptotically and never actually achieved. 1979Nature 29 Mar. 408/2 QCD loses its property of asymptotic freedom if there are more than 16 quark flavours. 1981M. Gell-Mann in J. H. Mulvey Nature of Matter viii. 172 This notion of ‘asymptotic freedom’ suggested by the theory has been amply confirmed by experiment. |